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This article in AJ

  1. Vol. 104 No. 6, p. 1501-1509
     
    Received: Oct 11, 2011
    Published: October 25, 2012


    * Corresponding author(s): h.zakeri@usask.ca
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doi:10.2134/agronj2011.0339

Lentil Performance in Response to Weather, No-Till Duration, and Nitrogen in Saskatchewan

  1. Hossein Zakeri *a,
  2. Guy P. Lafondd,
  3. Jeff J. Schoenauc,
  4. M. Hadi Pahlavanif,
  5. Albert Vandenbergb,
  6. William E. Mayd,
  7. Chris B. Holzapfele and
  8. Rosalind A. Bueckertb
  1. a Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada
    d Agriculture and Agri-Food Canada, Box 760, Indian Head, SK S0G 2K0, Canada
    c Dep. of Soil Science, Univ. of Saskatchewan, 51 Campus Dr., Saskatoon, SK S7N 5A8, Canada
    f Dep. of Plant Breeding and Biotechnology, Gorgan Univ. of Agricultural Sciences and Natural Resources, P.O. Box 386, Gorgan, Iran
    b Dep. of Plant Sciences, Univ. of Saskatchewan, 51 Campus Dr., Saskatoon, SK S7N 5A8, Canada
    e Indian Head Agricultural Research Foundation, Box 156, Indian Head, SK S0G2K0, Canada

Abstract

Increased soil N in no-till (NT) systems can interfere with biological dinitrogen fixation (BNF), stimulate vegetative biomass, and affect harvest index (HI) and yield of lentil (Lens culinaris L.). In the black soils of Saskatchewan, the effects of short-term (5–7 yr: ST) and long-term (28–30 yr: LT) NT practices on lentil were investigated in two experiments from 2006 to 2008. One trial tested the effects of NT duration on plant N and yield of five cultivars; the second examined the response of a late-maturing cultivar to NT duration at four rates of N fertilization. In both studies, average grain yield in 2006 and 2007 (warm seasons) was 21% greater than in 2008 (cool season), although total rainfall and plant N content was similar in 2007 and 2008. Average soil available N over the years was 23% greater in LT than ST, but the cultivars had 33% less N and 28% less yield in LT than ST in a dry year (2006), and similar performance in LT and ST in the wet years (2007 and 2008). The 60 kg N ha−1 treatment in the second trial diminished the yield difference between LT and ST in 2006. The only BNF measurement in 2008 showed that the cultivars fixed 10% less atmospheric N2 in LT than ST in this year. Overall, cool and wet growing conditions stimulate vegetative biomass and lower HI and yield of lentil, whereas a possible reduction of lentil BNF in NT systems is less likely to affect lentil yield.

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Copyright © 2012. Copyright © 2012 by the American Society of Agronomy, Inc.